Date: 04-08-2001
Time: 15:17 BST
Location: Macclesfield, Cheshire UK
Type: Frontal/Trough-enhanced Multicell
Documented by: Mark Seltzer
Equipment: Samsung VP-H65 Video Camera
Footage Quality: VHS

Storm Statistics: T0038.doc
Event Timeline: T0038events.xls

This was one of the more unconventional thunderstorms you get when a mini-occlusion (or cloud head / trough associated with a triple-point) becomes more active when it runs into land and lifts warm air. This particular cell formed on the top end of the trough/occlusion wave which gave it a long leading-edge to its north side as it pivoted upwards. The discharges were almost all from under the base (no I-Cs) and composed of C-Cs and C-Gs equally. It rolled right overhead and had a persistent discharge rate showing uniform and steady development.

There was a stroke of luck with one C-G shot which happened to the north of Macclesfield right in the centre-frame of the camera, which incidentally was a new angle right after I moved it from a C-C streak filmed to the south. The C-G appeared to fall into dry air on the footage, but it was more likely that it was right on the leading edge of the rain curtain which was just overhead at the time of strike, so the visibility in the northerly direction was very good.

The storm continued to do it’s thing as it rolled NE over the Pennines.

DUNDEE SATELLITE IMAGES (CREDITS)
VISIBLE 04.08.2001 14:07
VISIBLE 04.08.2001 14:07 + Grid
INFRARED 04.08.2001 14:07
INFRARED 04.08.2001 14:07 + Grid